Machine for making paper bags



Sept. 16, 1930. I s. wEcl-gsLl-:R 1,775,793

MACHINE FOR MAKING PAPER BAGS I Filed NOV. 25', 1927 3 Sheets-Shea?l 1 aucun 65Min,@ 9L M, 13

Sept. 16, 1930. 5, WECHSLER j 1,775,793

MACHINE FOR MAKING PAPER BAGS Y l inventent 5- WECHSLER SePt- 16 1930- I s. wEcHsLER 1,775,793

* MACHINE FOR MAKING PAPER BAGS Filed Nov. 25, 1927 3 Sheets-Sheet 3 IIIIIIIIIIIIIIIIIIIIlllllllllllllllllllllll '|llllllllllllml A SWECHSLER Patented Sept. 16,y 1930 `UNITI-:D STATES PATENT oFFIcE SAMUEL WECHSLER, OF CLEVELAND, OHIO MACHTNE ron MAKING PATER BAGS Application led. November 25, 1927. Serial No. 235,514.

The present invention relates to an improvement in paper bag machines, particularly machines of the special type and kind shown in..my pending application for patent, Serial No. 161,560, filed January 17, 1927, in which two binding strips are sewn to the opposite end edges of the tube -coincidentlyf out any malfunction in sewing operations, and

with which the paste may be applied to the binding strip after it has been sewed in place and while the sewed bag is in rapid motion and being discharged.

In the accompanying drawings, Fig. 1 is a' plan or top View on a reduced scale, of a bag sewing machine embodying my improvement, and Fig. 2 is a cross section and elevation of the machine.' Fig. 3 is a vertical section on line 3 3 of Fig. 2, showing the pasting devices, but on a larger scale, than as shown in Fig. 2. Fig. 4c is a sectional view and elevation, on a still larger scale, of a set of paste distributing arms and the controlling Valve therefor. Fig. 5 is a horizontal section on line 55 of Fig. 4. Fig. 6 is a rear elevation of the apparatus shown in Fig. 2, but on a larger scale and portions being broken away and omitted to permit the ends of the upright f frame and working parts thereon to be shown.

Fig. 7 is a perspective view of one of the paste distributing devices operating on one end of a bag. Fig. 8 is an enlarged sectional view of one end of the bag and a binding strip s'ewed thereto, and showing the perforatedv extremities of two paste distributing tubes in discharging position beneath the free flaps of the binding strip.

In producing a type of paper bag known as the Bates valve bag, a fiat tube T made of a plural number of tubes or plies of paper is fed to a pair of Sewing machines M-M together with vSeparate strips S-S of binding material, such as strips of tough paper. These strips are folded or doubled around the end edges of the tube by means of suitable folding or hemming devices F-F as'the tube is being fed to the twin sewing machines which sew the binding strips or tapes to the tube as folded or doubled thereon, the seam or stitch line 2 being parallel with and relativel near the edge of the tube, thereby leaving ree end portions'or flaps 3--3 on opposite sides of the tube. The strip being of tough-material these flaps have springy qualities and when the strip is lsewn or stitched to the body of the tube the normal tendency of each flap is to fold itself vflat upon the face of the tube. A fairly satisfactory seal for the end of the bag is thus provided, but with certain classes of goods it is desirable to seal such bags additionally with paste or an adhesive. The body of the bag is of heavy stock andV usually a number of flat tubes are sleeved and sewn together to provide heavy and du- Table bags, such bags for example as commonly used to hold and transport cement or other finely powdered material. The sewing of a tough binding stripv to such heavy stock .or many plies of heavy paper is rendered exceedingly diiiicult I find when a wet or moist .adhesive is applied to the binding strip preliminary to sewing the strip and edge of the tube together. Therefore I have provided means for applying a liquid adhesive or paste -to the inner faces of both flaps 3-3 of the binding strip subsequently to the sewing of the strip to the tube, and means are also provided to draw the sewed strip and bag forwardly and maintain a tension on the strip during the sewing and paste applying operations. nasmuch as the pasting and sewing operations are carried on together simultaneously the machine is also constructed and arranged to Start and Stop the cooperating mechanisms'together, and as it is also desirable to carry on the operations of sewing and pasting bags with as little 1nterruption and delay as possible the pasting devices are particularly mounted .and arranged to permit them to be readily adjusted and quickly placed in and out of working position and to permit convenient replacements, changes and setting to' be made. Thus, the two power-operated sewing machines M--M are supported at opposite sides of or within a table 5 over which the flat tubes and bags are fed singly and successively with each end edge passing underneath a sewing machine needle after the tube and the binding strips leave the folding devices F--F.

' An upright skeleton frame 6 is attached to and spans table 5, in front of the two sewing machines, and two paste receptacles R-R are supported for relative movement transversely of the table upon parallel bars 7 at the top of the said frame, clamping straps 8 or other suitable fastening being used to fix the receptacle adjustably thereon. Each paste receptacle has adischarge spout9 depending therefrom which carries a valved fitting 10 at its lower end. Each fitting 10 supports a rotatable head 11 which may be screw-connected therewith or secured thereto in any suitable way, and the rotatable movement of this head 11 about'a vertical axis may be limited by a thumb screw 12 extending through a slot 14 in the side wall of the head. Fitting 10 embodies a screw-threaded valve member 15 having an opening adapted to register with the paste passage in the discharge spout when said Valve member is given a partial turn by a lever 16.l The screwthreads on the valve member are preferably line screw-threads so that the turning movement does not shift the member materially lengthwise of its axis, and such a screwthreaded valve is preferred over a 'smoothly finished valve plug in that it does not wedge or bind when used with a paste. The paste which flows through the valve and into head 11 escapes by way of two pipes 17 and 18 extending laterally at different elevations from one side of the head. Each escape pipe has an elbow 19 screwed or rotatably fixed to its outer end, and separate paste discharging tubes 20-21 are secured to these elbows. The discharge tubes extend onrhorizontally inclined lines toward the head of a t sewing machine directly in line with the discharge spout, and the free ends of the tubes are bent or curved transversely and also iattened to permit their extremities to vproject beneath the free iaps 3-3 of the strip of binding material after it has been sewed to the flat tubular body of the bag. The discharge tubes therefore extend beyond the head of the sewing machine and one discharge tube is preferably somewhat longer than the other to permit the flaps on opposite sides of the bindings to be engaged at separate places or in different regions, thereby avoiding too great a strain on the strip at a single place or point of sewed union with the bag body. The paste is discharged through a single opening 22 in one side only of the fiattened extremity of each tube, and this opening 22 may be placed adjacent the face of the bag body so as to deposit the paste'on that face or surface,l or it may be located on the other side to deliver the paste to the free flap 3 of the binding strip. Then as the bag and binding tape are drawn onward by a set of rollers 23 the tension on the strip and the inherent springy nature of the paper of which the strip'is made will cause the free flaps to press against the paste as applied linearly to the bag and thereby seal the strip on both sides of the tube or bag. The feed rollers 23 then press the pasted strip more firmly to the body of the tube or bag as the strip and bag pass therethrough, although such subsequent or final pressing is not absolutely necessary with some kinds of paper materials. The feed tubes 20 and 21 are free to swing vertically with respect to the fiat bag, being supported by the elbows 19-19 which are free to rotate on parallel horizontal axes, and as each pair of feed tubes is also mounted upon a common head 11 which may be rotated about a vertical axis said tubes may also swing in a horizontal plane or transversely to place their curved discharge ends in contact with the bag in line with and underneath the binding strip. As such twin sewing machines are also constructed to permit adjustments for sewing bags of different sizes or lengths provision is made to also permit the two pasting receptacles and the paste 'feeding devices to be adjusted transversely on the upright frame as hereinbefore described. However, the two separate paste feeding appliances must be under a common control and the controlling means such that the aforesaid adjustments may be easily made. For that purpose I support a reciprocatory bar 25 in a slidable position transversely of upright frame 6 upon a gear 35 and a roller 13, and secure two forked plates or members 26 in independently adjustable positionsuponsaidbartoengagetherespective levers 1'6 of the paste valves 15. Thus, bar 25 is slotted to receive clampingr bolts 27 for the forked plates 26, and in adjusting the pasting appliances transversely of the table to operate on a given sized bag, the forked plates 26 may be correspondingly adjusted to operate the valves in their changed positions. Other adjustments of the forked member and the valved levers are also thereby permitted i to change the degree of opening of the valves and to regulate the flow of paste therethrough. Both valves are opened and closed coincidently by reciprocating bar 25 which operation is controlled by the foot of the operator and effected by a treadle 28 which is connected'by a chain 29 to an arm 30 on a rock shaft 31 adapted to be supported in brackets beneath table 5, see Fig. 2. A cord or cable 32 is connected at one end to a second arm 33 on rock shaft 31, and this cable passes around several sheaves 34 and thence upwardly to the arm of a pivoted segment of a gear 35 which meshes with a rack or gear teeth 36 on `bar 25. A spring 37 carried by a bracket 38 on upright frame 6 engages a lug 39 on one end of bar 25, whereby after each movement. imparted to bar 26 by the rack mechanism the spring will return the bar to its original *position .upon release by the operator of hisfoot pressure on the itreadle. As long as the operator holds the treadle down the paste will flow, and when he relieves the pressure on the treadle the spring will shift bar 25 and close the paste valves. The sewing and pasting operations proceed quite rapidly, including the feeding of the bags, and there are times when the operator must stop the machine instantly. If the paste were permitted to iow during a cessation of bag sewing and feeding opera-v tions, the results would be destructive and objectionable. Therefore, I provide an arm 40l on rock shaft 31 and a flexible connection or chain 42 extending from this arm to an elect-ric switch 43 or any suitable throw-oft' or disconnecting device for the power which operates the sewing machines. Accordingly when the operator disconnects or throws off the power to stop the sewing machines thc feed valves for the paste are simultaneously operated and closed, and no waste of paste occurs nor will the bag undergoing the sewpaste or the seam injured by the use of an excessiveamount of paste.-

Now, reverting briefly to the reciprocable bar 25: This bar carries a set screw 44 adapted to engage a stopfmember 45 on a cross piece 46 of frame 6. Screw 44 may be adj usted to limit the movement of the rack bar and thus determine the degree of opening movement imparted to the valves which control or regulate the amount of paste to be delivered to the binding strips. It is also desirable that bar 25 be supported in a. freely movable position on frame 6, and to serve that purpose one end of the bar is supported on a roller 13, and the opposite end is supported on segment gear 35. Other means .may be used to operate the valvesthan as shown and described herein, and therefore l do not wish to limit myself to the specific structure shown and described, and other changes and modifications might be made in the structure without departing materially from the spirit and scope of the invention as embraced in the appended claims.

What I claim, is:

1. In a machine for making paper bags, a pair of sewing machines and a pair `of binding devices adapted to seal the opposite ends of a flat tubular bag body, together with a set of pasting appliances located behind, said sewing machines and adapted to deliver separate streams of paste linearly to the bound and sewed ends of said bag body, and a common means for controlling and effecting joint operation of said pair of sewing machines and said set of pasting appliances.

zontally relatively to said binding strip.

around the end edges of said bag body, separate sets of paste delivering tubes arranged to deposit paste linearly on opposite sides of said bag body beneath said `binding stripsl adjacent the stitched seam, and means for controlling and .eii'ecting conjoint starting and stopping operations of said sewing machines and the iiow of separate streams of paste to said delivering tubes. v

3. In a machine for making paper bags, a table, a pair of sewing machines and a pair of binding devices operating in the plane of said table, a frame spanning said table, paste receptacles supported by. said frame having valved spouts, and each spout having a pair of branch tubes extending therefrom adapted to deliver paste to different horizontal planes relatively to the seams made by said sewing machines.

4. In a` machine for making paper bags, associated means` for sewing and binding parallel edge portions of bag stock simultaneing and pasting operation become fouled with ously, and two sets of paste delivery tubes rotata ly mounted adjacent said parallel edge portions adapted to deposit separate streams of paste linearly upon the stock within the binding during the operation of said sewing machines.

5. In a machine for making paper bags, assoeiated mechanisms for sewing and binding the edge of bag stock, and a paste delivery tube mounted to swing in a vertical plane and also arranged to be shifted horizontally in respect to the binding and edge of the bag stock.

6. In a machine for making paper bags,

. binding and sewing mechanisms for securing a strip of binding) material to the border portion of a paper ag, and means for feeding paste to said border portion and strip, in-v cluding a delivery head rotatable on a vertical axis and a discharge tube adapted to swing on a horizontal axis.

7. In a machine for making paper bags, sewing and binding mechanism adapted to secure a strip of bindingmaterial around the edge of a flat tubular bag body, and means for feeding paste to said strip of binding material 'on opposite sides of the bag body, including a .rotatable head having two delivery tubes pivotally secured thereto at different elevations to permit the discharge endsl of said tubes to be shifted vertically and hori- 82 In a machine for making paper bags, means for sewinga binding to the border edge of a paper bag body, and means for applying paste to the binding, including a delivery spout having two discharge tubes of different length mounted to swing thereon, the disqharge ends of said tubes being flattened and projected laterally to permit them to project within the open folds of the binding on opposite sides of the bag body.

9. In a machine for making paper bags, means for afliXing a binding to the border edge of a flat bag body, together with means for feeding paste to said binding, including a fitting having a rotatable screw-threaded valve member therein, and a discharge tube secured to said fitting.

10. In a machine for making paper bags, mechanism and means for folding and sewing a strip of binding material around the edge of a paper bag body, means for imparting a pulling movement to the bag and tension to the strip beyond the sewing devices, and means for distributing paste to said strip during the sewing thereof, intermediate the sewing devices and the pulling and tension means.

11. In a machine for making paper bags, associated means and devices for sewing and binding the parallel edges of a fiat tubular bag body, means for applying a pulling tension on the binding at each edge of the bag body, and means for delivering paste between the bag body and each binding adjacent the sewed seams and where the binding is under tension.'

12. In a machine for making paper bags, means for folding a strip of binding material around one end of a flat tube, means for sewing the folded strip to said tube end, and means for depositing separate streams of liquid paste upon said flat tube after sewing said folded strip thereto, said streams of liquidpaste being deposited upon said tube beneath said binding strip and adjacent the sewed seam.

13.v In a machine for making paper bags, power operated means for sewing a binding to the edge of a bag, means for depositing and controlling a flowing stream of liquid paste upon the sewed bag beneath said binding, and a common controlling device for said power operated means and said paste depositing means adapted to start and stop simultaneously the operation of said means for sewing said bag and the iow of the stream of the liquid paste deposited bysaid liquid depositing means.

14. In a machine for making paper bags, means for binding a bag, means for sewing the binding to said bag, means for delivering paste linearly upon said bag beneath said binding after sewing thereof and adjacent the sewed seam, and means for effecting concurrent operation and non-operation of said sewing and pasting means.

15. In a machine for making paper bags, a pair of sewing machines arranged to sew separate strips of binding material to parallel border edges of a bag body, and a set of paste delivering appliances movably mounted behind said sewing machines and adjustable relatively to eachother and said border edges of the bag.

16. In a machine for making paper bags, a pair of sewing machines adapted to sew separate strips of binding material to parallel edge portions of a bag body, and two sets of adjustable paste delivery tubes arranged adjacent and 'behind said sewing machines adapted to deposit paste underneath'the binding material previously sewed to said body.

17. In a machine for` making paper bags, associated means for sewing and binding the border portion of bag stock simultaneously, together with a pair of tubes adapted to deliver separate streams of paste upon opposite sides of the bag stock, beneath the binding previously sewed to the bag, said tubes being adjustable horizontally in respect to said border edge and binding.

In testimony whereof I aliix my signature.

SAMUEL WECHSLER. 

